EP 4162146 A1 20230412 - MOTOR CURRENT BALANCING METHOD FOR ESP SYSTEM
Title (en)
MOTOR CURRENT BALANCING METHOD FOR ESP SYSTEM
Title (de)
MOTORSTROMAUSGLEICHSVERFAHREN FÜR ESP-SYSTEM
Title (fr)
PROCÉDÉ D'ÉQUILIBRAGE DE COURANT DE MOTEUR POUR SYSTÈME ESP
Publication
Application
Priority
- US 202016891902 A 20200603
- US 2021070645 W 20210601
Abstract (en)
[origin: US2021384858A1] Systems and methods for reducing current imbalance in a motor, where one embodiment comprises a system having an ESP installed in a well, an electric drive, and a power cable coupled between the drive and the ESP's motor. The electric drive generates output voltage waveforms (e.g., PWM waveforms) for multiple phases that may have different impedances. The system monitors the current of each phase at the output of the electric drive and determines a current imbalance between the phases. The drive generates voltage adjustments (e.g., duty cycle adjustments) corresponding to the respective phases, and applies each voltage adjustment to the corresponding voltage waveform. For example, the drive may determine an average of the phase currents, determine the difference between each phase current and the average, and multiply the result by a gain factor to generate the voltage for each phase. The process is iteratively performed to reduce the current imbalance.
IPC 8 full level
E21B 43/12 (2006.01); H02P 6/12 (2006.01); H02P 23/00 (2006.01); H02P 27/08 (2006.01)
CPC (source: EP US)
E21B 43/128 (2013.01 - EP US); H02P 6/10 (2013.01 - EP); H02P 6/28 (2016.02 - EP); H02P 21/05 (2013.01 - EP); H02P 23/14 (2013.01 - US); H02P 27/085 (2013.01 - EP US)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
Designated validation state (EPC)
KH MA MD TN
DOCDB simple family (publication)
US 11368119 B2 20220621; US 2021384858 A1 20211209; AR 122540 A1 20220921; CA 3180423 A1 20211209; CO 2022017305 A2 20221209; EP 4162146 A1 20230412; WO 2021247762 A1 20211209; WO 2021248155 A1 20211209
DOCDB simple family (application)
US 202016891902 A 20200603; AR P210101527 A 20210603; CA 3180423 A 20210601; CO 2022017305 A 20221201; EP 21817167 A 20210601; US 2021035529 W 20210602; US 2021070645 W 20210601